JeroenErven046I owned TA-01 before. All I can say is that it is super powerful but that's it. Sound wise I don't find it very appealing. Even as a hybrid I can hardly tell the tube effect to be honest, but it could be just me. Can't comment much on sap2. The only smsl product I have is VA2 and this one is a mile better than TA-01 imo even though it is not even as half powerful as TA-01. Sounds very clean and crisp. A little bit bright and mid forward, just a little bit. Pairs pretty well with my m40x and 880 600ohm.